Hamina (Swedish: Fredrikshamn) is a town in Kymenlaakso, Finland. As of 31 May 2013, 21,252 people lived there. Nearby municipalities are Kotka, Kouvola, Luumäki, Miehikkälä and Virolahti. Writer Laila Hietamies wrote a book about Hamina.
The town plan of Hamina differs from what is usual in Finland. It is rare in other countries too. Another town with a similar plan is Palmanova, in Italy.
A local museum is located on the island of Tammio, near to the town.